.sec-head {
				text-align: center;
				margin-bottom: 48px;
			}

			.sec-head h2 {
				font-size: 34px;
				font-weight: 800;
				letter-spacing: -.4px;
				margin-bottom: 8px;
				color: var(--primary);
			}

			.sec-head .underline {
				display: block;
				width: 50px;
				height: 3px;
				background: var(--gold);
				margin: 0 auto 12px auto;
				border-radius: 2px;
			}

			.sec-head p {
				color: var(--text-muted);
				font-size: 15px;
			}

			section {
				padding: 80px 0;
			}

			section:nth-of-type(odd) {
				background: var(--white);
			}

			section:nth-of-type(even) {
				background: var(--bg);
			}


			/* ==========================================
		   2. 页面专属样式 (仅限 白皮书.html 使用)
		========================================== */

			/* 页面 Banner */
			.page-banner {
				height: 320px;
				position: relative;
				overflow: hidden;
			}

			.page-banner-bg {
				width: 100%;
				height: 100%;
				background: url('https://picsum.photos/id/1015/1920/600') center/cover no-repeat;
			}

			.page-banner-overlay {
				position: absolute;
				inset: 0;
				background: linear-gradient(180deg, rgba(58, 58, 58, .65) 0%, rgba(58, 58, 58, .85) 100%);
				display: flex;
				flex-direction: column;
				justify-content: center;
				align-items: center;
				text-align: center;
				color: #fff;
			}

			.page-banner-overlay h1 {
				font-size: 42px;
				font-weight: 800;
				margin-bottom: 12px;
				letter-spacing: -.5px;
			}

			.page-banner-overlay p {
				font-size: 18px;
				color: rgba(255, 255, 255, .75);
				max-width: 600px;
				line-height: 1.6;
			}

			/* 白皮书网格 */
			.whitepapers-grid {
				display: grid;
				grid-template-columns: repeat(3, 1fr);
				gap: 24px;
			}

			.whitepaper-card {
				background: var(--bg-card);
				border-radius: var(--radius);
				overflow: hidden;
				box-shadow: var(--shadow-sm);
				border: 1px solid var(--border);
				transition: all .35s cubic-bezier(.25, .46, .45, .94);
				display: flex;
				flex-direction: column;
			}

			.whitepaper-card:hover {
				transform: translateY(-6px);
				box-shadow: var(--shadow-lg);
			}

			/* 封面区域 - 深灰高级质感 */
			.wp-cover {
				height: 220px;
				position: relative;
				overflow: hidden;
				display: flex;
				align-items: center;
				justify-content: center;
				/* 使用渐变与微妙纹理感 */
				background: linear-gradient(135deg, #4a4a4a 0%, #2d2b28 100%);
			}

			/* 装饰性几何背景 */
			.wp-cover::before {
				content: '';
				position: absolute;
				width: 150%;
				height: 150%;
				top: -25%;
				left: -25%;
				background: radial-gradient(circle at 30% 30%, rgba(210, 166, 105, .08) 0%, transparent 50%),
					radial-gradient(circle at 80% 80%, rgba(255, 255, 255, .03) 0%, transparent 40%);
				transform: rotate(15deg);
			}

			.wp-cover-icon {
				position: relative;
				z-index: 1;
				width: 64px;
				height: 64px;
				border-radius: 16px;
				background: rgba(255, 255, 255, .1);
				backdrop-filter: blur(10px);
				display: flex;
				align-items: center;
				justify-content: center;
				border: 1px solid rgba(255, 255, 255, .1);
			}

			.wp-cover-icon svg {
				width: 32px;
				height: 32px;
				color: var(--gold);
			}

			.wp-tag {
				position: absolute;
				bottom: 14px;
				right: 16px;
				z-index: 2;
				background: rgba(0, 0, 0, .4);
				backdrop-filter: blur(4px);
				color: rgba(255, 255, 255, .8);
				font-size: 11px;
				font-weight: 700;
				padding: 4px 10px;
				border-radius: 6px;
				letter-spacing: 1px;
				border: 1px solid rgba(255, 255, 255, .08);
			}

			.whitepaper-body {
				padding: 28px;
				display: flex;
				flex-direction: column;
				flex: 1;
			}

			.whitepaper-body h3 {
				font-size: 18px;
				font-weight: 700;
				color: var(--primary);
				margin-bottom: 12px;
				line-height: 1.4;
			}

			.whitepaper-meta {
				font-size: 13px;
				color: var(--text-muted);
				line-height: 1.6;
				margin-bottom: 16px;
			}

			.whitepaper-desc {
				font-size: 14px;
				color: var(--text-muted);
				margin-bottom: 24px;
				flex: 1;
			}

			.download-btn {
				display: inline-flex;
				align-items: center;
				justify-content: center;
				gap: 8px;
				background: var(--primary);
				color: var(--gold);
				text-decoration: none;
				padding: 11px 24px;
				border-radius: var(--radius-sm);
				font-weight: 600;
				font-size: 14px;
				transition: all .22s;
			}

			.download-btn svg {
				width: 16px;
				height: 16px;
			}

			.whitepaper-card:hover .download-btn {
				background: #2a2a2a;
			}

			/* 合作出版 - 左右分栏 */
			.cooperation-card {
				background: var(--bg-card);
				border-radius: var(--radius);
				padding: 60px;
				box-shadow: var(--shadow-md);
				border: 1px solid var(--border);
				display: grid;
				grid-template-columns: 1.2fr 1fr;
				gap: 60px;
				align-items: center;
				position: relative;
				overflow: hidden;
			}

			/* 左侧金色竖条 */
			.cooperation-card::before {
				content: '';
				position: absolute;
				left: 0;
				top: 0;
				bottom: 0;
				width: 4px;
				background: linear-gradient(180deg, var(--gold), var(--gold-bright));
			}

			.coop-text h3 {
				font-size: 28px;
				font-weight: 800;
				color: var(--primary);
				margin-bottom: 20px;
			}

			.coop-text .underline-left {
				display: block;
				width: 40px;
				height: 3px;
				background: var(--gold);
				margin-bottom: 24px;
				border-radius: 2px;
			}

			.coop-text p {
				font-size: 16px;
				color: var(--text-mid);
				line-height: 1.8;
				margin-bottom: 12px;
			}

			.coop-contact {
				margin-top: 24px;
				font-size: 14px;
				color: var(--text-muted);
				display: flex;
				align-items: center;
				gap: 8px;
			}

			.coop-contact svg {
				width: 16px;
				height: 16px;
				color: var(--gold);
				flex-shrink: 0;
			}

			.coop-qr {
				text-align: center;
			}

			.coop-qr-box {
				display: inline-block;
				background: var(--bg);
				padding: 16px;
				border-radius: var(--radius);
				box-shadow: var(--shadow-sm);
			}

			.coop-qr-box img {
				width: 200px;
				height: 200px;
				border-radius: 10px;
				display: block;
			}

			.coop-qr p {
				margin-top: 14px;
				font-size: 14px;
				color: var(--text-muted);
			}

			/* 专属响应式 */
			@media (max-width: 1024px) {
				.whitepapers-grid {
					grid-template-columns: repeat(2, 1fr);
				}
			}

			@media (max-width: 768px) {
				.page-banner {
					height: 240px;
				}

				.page-banner-overlay h1 {
					font-size: 28px;
				}

				.container {
					padding: 0 16px;
				}

				section {
					padding: 56px 0;
				}

				.whitepapers-grid {
					grid-template-columns: 1fr;
				}

				.cooperation-card {
					grid-template-columns: 1fr;
					gap: 40px;
					padding: 36px 24px;
				}
			}